exploit the possibilities
Home Files News &[SERVICES_TAB]About Contact Add New

script.command.txt

script.command.txt
Posted Dec 18, 2001
Authored by Marco van Berkum | Site ws.obit.nl

The script command overwrites hardlinks named typescript in the current directory.

tags | exploit
SHA-256 | d79023227c22e8ad95ff6441f4cb693f4c84fd87bea085fa786b664d343ebb48

script.command.txt

Change Mirror Download
-------------------------------------------------------------
Title: Silly hardlink vulnerability in UNIX 'script' command
Linux version maintainer: Andries Brouwer (Andries.Brouwer@cwi.nl)
Bug found by: Marco van Berkum (m.v.berkum@obit.nl)
Date: 17-12-2001
Priority: low
-------------------------------------------------------------

Script command
--------------
The script command which is part of the util-linux
package (all UNICES are vulnerable, not only linux)
contains a silly hardlink vulnerability which could overwrite
any file on the harddisk. Script is a tool to save terminal
sessions for later reference. By default script creates
a file called typescript for its log.


The problem
-----------
Very simple, script (when executed as root) overwrites
hardlinks that could be set by any user to any file on
the harddisk. For instance, a malicious user can place
a hardlink 'typescript' to /etc/passwd (or any other file)
in his home directory. If the root user would execute
script in that directory it would cause script to
overwrite that file. Script does check for symlinks and
asks if the symlink should be overwritten, it lacks
checking hardlinks.

Priority
--------
Low, its not likely that root users execute script
in a user's home directory. They could though, its
a minor problem that must be fixed for that reason.

Fix
---
The util-linux maintainer was notified and fixed the problem
in the next version. Still, all UNICES seem to have this
problem.

Just my 2 cents,
Marco van Berkum
--
_________________________________________________________________
| Marco van Berkum | m.v.berkum@obit.nl | 'Error #152 |
| Security Engineer | MB17300-RIPE | Windows not found |
| Network Admin | http://ws.obit.nl |(C)heer (P)arty (D)ance'|
-----------------------------------------------------------------


Login or Register to add favorites

File Archive:

March 2024

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    Mar 1st
    16 Files
  • 2
    Mar 2nd
    0 Files
  • 3
    Mar 3rd
    0 Files
  • 4
    Mar 4th
    0 Files
  • 5
    Mar 5th
    0 Files
  • 6
    Mar 6th
    0 Files
  • 7
    Mar 7th
    0 Files
  • 8
    Mar 8th
    0 Files
  • 9
    Mar 9th
    0 Files
  • 10
    Mar 10th
    0 Files
  • 11
    Mar 11th
    0 Files
  • 12
    Mar 12th
    0 Files
  • 13
    Mar 13th
    0 Files
  • 14
    Mar 14th
    0 Files
  • 15
    Mar 15th
    0 Files
  • 16
    Mar 16th
    0 Files
  • 17
    Mar 17th
    0 Files
  • 18
    Mar 18th
    0 Files
  • 19
    Mar 19th
    0 Files
  • 20
    Mar 20th
    0 Files
  • 21
    Mar 21st
    0 Files
  • 22
    Mar 22nd
    0 Files
  • 23
    Mar 23rd
    0 Files
  • 24
    Mar 24th
    0 Files
  • 25
    Mar 25th
    0 Files
  • 26
    Mar 26th
    0 Files
  • 27
    Mar 27th
    0 Files
  • 28
    Mar 28th
    0 Files
  • 29
    Mar 29th
    0 Files
  • 30
    Mar 30th
    0 Files
  • 31
    Mar 31st
    0 Files

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2022 Packet Storm. All rights reserved.

Services
Security Services
Hosting By
Rokasec
close